Are these reactions correct?
I was told to do them in "reaction de deplacement simple", or simple moving reaction, I think.
1. Mg + 2HCl = H2 + MgCl2
2. Li + HCl = H2 + LiCl
3. Fe + 2HCl = H2 + FeCl2
4. Zn + 2HCl = H2 + ZnCl2
5. Ca + 2HCl = H2 + CaCl2
6. 2Li + H2O = H2 + Li2O
7. Ca + H2O = H2 + CaO
8. 2Li + Cu2+ = Li2Cu
9. 2Fe + 3Cu2+ = 2Fe2Cu3
10. Zn + Cu2+ = ZnCu
11. Ca + Cu2 = CaCu
12. Li + Fe2+ = Li2Fe
13. Ca + Fe2+ = CaFe
No question.
To determine if these reactions are correct in terms of "reaction de déplacement simple" or simple displacement reactions, we need to compare the reactivity of the metals involved. In a displacement reaction, a more reactive metal can displace a less reactive metal from its compound.
Let's analyze each reaction:
1. Mg + 2HCl = H2 + MgCl2
This reaction is correct. Magnesium (Mg) is more reactive than hydrogen (H2) and can displace it from hydrochloric acid (HCl), forming magnesium chloride (MgCl2).
2. Li + HCl = H2 + LiCl
This reaction is also correct. Lithium (Li) is more reactive than hydrogen (H2) and can displace it from hydrochloric acid (HCl), forming lithium chloride (LiCl).
3. Fe + 2HCl = H2 + FeCl2
This reaction is also correct. Iron (Fe) is more reactive than hydrogen (H2) and can displace it from hydrochloric acid (HCl), forming ferrous chloride (FeCl2).
4. Zn + 2HCl = H2 + ZnCl2
This reaction is also correct. Zinc (Zn) is more reactive than hydrogen (H2) and can displace it from hydrochloric acid (HCl), forming zinc chloride (ZnCl2).
5. Ca + 2HCl = H2 + CaCl2
This reaction is correct. Calcium (Ca) is more reactive than hydrogen (H2) and can displace it from hydrochloric acid (HCl), forming calcium chloride (CaCl2).
6. 2Li + H2O = H2 + Li2O
This reaction is incorrect. Lithium (Li) is a less reactive metal than hydrogen (H2). It cannot displace hydrogen from water (H2O). The correct reaction would be:
2Li + 2H2O = 2LiOH + H2
7. Ca + H2O = H2 + CaO
This reaction is incorrect. Calcium (Ca) is a less reactive metal than hydrogen (H2) and cannot displace it from water (H2O). The correct reaction would be:
Ca + 2H2O = Ca(OH)2 + H2
The remaining reactions (8 to 13) involve metal ions being displaced by metals, which are not simple displacement reactions. These reactions involve redox reactions or complex formation and are not classified as "reaction de déplacement simple". Therefore, they are not suitable for this category.
It is essential to note that the reactivity of metals is not constant, and different factors can influence their reactivity. This categorization is a general guideline but may not always hold true under specific conditions.